JP6929180B2 - Temporary construction method for work scaffolding in a boiler - Google Patents

Description

INDUSTRIAL APPLICABILITY According to the present invention, work in a boiler furnace suitable for temporarily installing a work scaffold for lifting a maintenance scaffold member used when assembling a maintenance scaffold in the combustion chamber of a boiler furnace from a cleaner hopper to a combustion chamber is provided in the cleaner hopper. Regarding the temporary scaffolding method.

Conventionally, when performing maintenance work on the combustion chamber of a boiler furnace of a pulverized coal-fired boiler, a worker hands a scaffolding member for maintenance from a manhole provided in the cleaner hopper into the cleaner hopper, and then carries it into the combustion chamber. The lifting wire is mounted using the wire holes (see the wire hole 115 shown in FIG. 8A) opened in the wall surfaces facing each other, and the lifting wire is hung diagonally using a moving winch or the like installed on the bottom of the boiler. The maintenance scaffold member was lifted through a narrow vertical communication hole to assemble the maintenance scaffold in the combustion chamber.
Therefore, it is necessary to hand over the maintenance scaffolding member from the narrow manhole into the clinker hopper or divide the maintenance scaffolding member into a size and shape that can be carried, resulting in poor workability.

As a method for solving such a problem, in Patent Document 1 below, a track is laid in a section from the outside of the boiler through a manhole to the inner part of the rectangle hopper below the vertical communication hole, and a scaffolding member for maintenance is provided. A scaffolding member carrying-in device is disclosed in which a scaffolding member transport vehicle including a rectangular frame body on which a rectangular frame body is placed and a bogie on which the rectangular frame body is placed is made to run along a track.

Japanese Unexamined Patent Publication No. 7-119913 Japanese Unexamined Patent Publication No. 8-219434

However, the scaffolding member carrying device disclosed in Patent Document 1 has the following problems.
(1) Scaffolding member In order to allow the maintenance scaffolding member placed on the transport vehicle and carried into the cleaner hopper to be lifted into the combustion chamber through the narrow vertical communication hole, the maintenance scaffolding member is lifted in the longitudinal direction thereof. A scaffolding member rotating device that rotates 90 degrees in a plane perpendicular to the vertical is required.
(2) Like the boiler furnace 110 shown in FIGS. 8A and 8B, the clinker hopper 112 has a plurality of pyramidal lower portions (hereinafter, referred to as “pyramidal lower portions”) (three in this example). In the boiler furnace 110 divided into two parts, the height of the lower part of the pyramid is about 4.5 m, so a track should be laid in the section from the outside of the boiler furnace 110 through the manhole 114 to the inner part of the clinker hopper 112. Is not easy.

An object of the present invention is to provide a temporary work scaffolding method for working scaffolding in a boiler furnace, which can easily temporarily install a working scaffolding having a simple structure in a clinker hopper.

The temporary work scaffolding method in the boiler furnace of the present invention is used for maintenance work in the combustion chamber (111) of the boiler furnace (110) in which the vertical communication hole (113) and the cleaner hopper (112) are separated. This is a temporary work scaffolding method in a boiler furnace for temporarily installing a work scaffold (1) for lifting a scaffold member from the cleaner hopper to the combustion chamber in the cleaner hopper, and a plurality of support frames (10, 20). The scaffolding work floor (81) is attached to the support frame mounting step for suspending the fire-resistant material (116) attached to the inner surface of the cleaner hopper, and the plurality of suspended support frames. It is characterized in that it is provided with a scaffolding work floor mounting step for mounting the.
Here, the pyramid-shaped lower portion of the clinker hopper is divided into a plurality of parts, and in the support frame mounting step, the plurality of support frames are hung above the pyramid-shaped lower part divided into the plurality of parts, and the scaffolding work floor. The scaffolding work floor may be attached to the plurality of suspended support frames in the attachment step, and the scaffolding work floor may be attached above the pyramid-shaped lower portion divided into the plurality.
A manhole (114) is opened in the surface-side pyramid-shaped lower portion of the plurality of pyramid-shaped lower portions, and in the support frame mounting step and the scaffolding work floor mounting step, the plurality of support frames and the said A plurality of anti-plates (81) for forming the scaffolding work floor may be carried into the cleaner hopper through the manhole.
Prior to the support frame mounting step, the main wire (131) is stretched horizontally through the wire holes (115) provided on the front and back surfaces of the combustion chamber to mount the lifting device (130) to the boiler furnace. Further, an attachment step such as a lifting device for attaching a moving winch (140) for moving the trolley (132) along the main wire to the boiler furnace may be provided.
To carry the plurality of support frames, the plurality of anti-plates, and the maintenance scaffolding member into the clinker hopper through the manhole after the mounting step of the lifting device and the like and before the support frame mounting step. It may be further provided with an installation step such as a carry-in stand (91) for attaching the carry-in stand (91) and a member carry-in inclined stand (92).
In the step of installing the carry-in stand or the like, the carry-in stand is installed in the vicinity of the manhole outside the boiler furnace, the upper end of the member carry-in inclined stand is inserted into the cleaner hopper through the manhole, and the inserted member is inserted. The upper end of the loading tilting pedestal is lifted by using the lifting device and the moving winch, and the portion other than the lower end of the member loading tilting pedestal is inserted into the cleaner hopper, and the member loading tilting pedestal is inserted. The lower end portion of the above and the carry-in stand may be connected, and the member carry-in inclined stand may be fixed to the front surface side pyramid-shaped lower portion by using a plurality of universal jacks (93).
After the installation step of the carry-in stand or the like, a carry-in frontage installation step of installing the carry-in frontage above the member carry-in inclined stand may be further provided.
In the carry-in frontage installation step, the first and second frontage installation frames (30, 40) are carried into the clinker hopper through the manhole, and the refractory material is carried using the lifting device and the moving winch. The outer and inner frontage frames (60, 70) are carried into the clinker hopper through the manhole and hung above the inclined frame for carrying in the members, and are used for installing the first and second frontages. It may be attached between frames.
The support frame is a horizontal beam (11,21) having a truss structure in which an upper pipe and a lower pipe are connected by a plurality of vertical members and diagonal members, and a plurality of left pipes and right pipes are connected with their upper ends aligned. The left support beams (12L, 22L), which are connected by plates and whose lower end is attached to the left end of the horizontal beam so as to be perpendicular to the horizontal beam, and other left pipes and The other right pipe was configured by aligning the upper ends with a plurality of other connecting plates, and the lower end was attached to the right end of the horizontal beam so as to be perpendicular to the horizontal beam. The right support beam (12R, 22R), the left hook plate (13L, 23L) whose right end is fixed to the upper end of the left support beam so as to be perpendicular to the left support beam, and the right support beam. The right hook plate (13R, 23R) whose left end is fixed to the upper end of the right support beam so as to be perpendicular to the left end, and the left hook plate so that the lower end protrudes downward from the left hook plate. Left claw plate (14L, 24L) attached to the left end surface of the above, and right claw plate (14R, 24R) attached to the right end surface of the right hook plate so that the lower end portion protrudes downward from the right hook plate. And may be provided.
In the scaffolding work floor mounting step, hooks attached to both ends of the anti-plate are hooked on the upper pipe of the horizontal beam, and a plurality of the anti-plates are placed between adjacent support frames of the plurality of support frames. It may be attached one by one.
The plurality of support frames include an intermediate frame (10) and an end frame (20), and the intermediate frame includes a first horizontal beam (11) corresponding to the horizontal beam and the left support beam. The first left support beam (12L) corresponding to the above, the first right support beam (12R) corresponding to the right support beam, and the first left hook plate (13L) corresponding to the left hook plate. A first right hook plate (13R) corresponding to the right hook plate, a first left nail plate (14L) corresponding to the left nail plate, and a first right nail plate corresponding to the right nail plate ( The end frame includes a second horizontal beam (21) corresponding to the horizontal beam, a second left support beam (22L) corresponding to the left support beam, and the right support beam. The second right support beam (22R) corresponding to the above, the second left hook plate (23L) corresponding to the left hook plate, and the second right hook plate (23R) corresponding to the right hook plate. A second left claw plate (24L) corresponding to the left claw plate, a second right claw plate (24R) corresponding to the right claw plate, the second left support beam, and the second right support. It may be provided with a handrail (25) attached between the beams.

The temporary construction method for working scaffolding in a boiler furnace of the present invention has the following effects.
(1) A work scaffold having a simple structure can be easily temporarily installed in the clinker hopper.
(2) Even in a boiler furnace in which the pyramidal lower part of the clinker hopper is divided into a plurality of parts, the work scaffolding can be easily temporarily installed.
(3) It is possible to reduce the number of workers, shorten the working time, and ensure safety.

It is a right side view for demonstrating the structure of the work scaffold 1 used in the work scaffold temporary construction method in a boiler furnace by one Example of this invention. It is a top view for demonstrating the mounting method of the anti-plate 81. It is a figure for demonstrating the structure of the intermediate part and end frames 10, 20 and the first and 2 frontage installation frames 30, 40, (a) is the front view of the intermediate part frame 10, and is (b). ) Is a front view of the end frame 20, (c) is a front view of the first frontage installation frame 30, and (d) is a front view of the second frontage installation frame 40. It is a figure for demonstrating the mounting method in the clinker hopper 112 of the intermediate part frame 10. It is a figure for demonstrating the structure of the outer frontage frame 60, 70, (a) is the right side view of the outer frontage frame 60, and (b) is the right side view of the inner frontage frame 70. It is a figure for demonstrating the procedure for temporarily constructing a work scaffold 1 in the clinker hopper 112, (a) is a figure for demonstrating procedure 2, and (b) is a figure for demonstrating procedure 3. .. It is a figure for demonstrating the procedure 4 for temporarily constructing a work scaffold 1 in a clinker hopper 112. It is a figure for demonstrating the structure of the boiler furnace 110 which divides the clinker hopper 112 into a plurality of parts and employs a sealing device 120, (a) is a front view of the boiler furnace 110, and (b) is a front view of the boiler furnace 110. It is a right sectional view of the lower part of the boiler furnace 110 for demonstrating the structure of the sealing device 120. It is a figure for demonstrating the attachment method of the lifting device 130 and the moving winch 140.

The above purpose was achieved by attaching the scaffolding work floor to a plurality of support frames suspended by being hooked on the upper end of the refractory material attached to the inner surface of the clinker hopper.

Hereinafter, examples of the temporary work scaffolding method for working in a boiler furnace of the present invention will be described with reference to the drawings.
In the temporary construction method of the work scaffold in the boiler furnace of the present invention, in the suspension type pulverized coal-fired boiler, the outside air seal for maintaining the pressure in the boiler furnace and the vertical communication hole and the cleaner hopper for absorbing the heat expansion downward in the boiler furnace are used. Focusing on the fact that a sealing device is used for this separation part (see, for example, Patent Document 2 above), the work scaffold is temporarily installed in the cleaner hopper using this separation part. do.

Such a sealing device is provided on the outer peripheral surface of the upper part of the sealing plate 121 and the fireproof material 116 attached to the inner surface of the cleaner hopper 112, for example, as in the sealing device 120 shown in FIGS. 8A and 8B. The upper end of the seal plate 121 is fixed to the separation surface between the vertical communication hole 113 of the boiler furnace 110 and the cleaner hopper 112, and the lower end of the seal plate 121 is underwater in the seal trough 122. Soaked in.
As a result, the combustion chamber 111 and the vertical communication hole 113 of the boiler furnace 110 can absorb the expansion allowance that extends downward due to thermal expansion with the seal trough 122.

Therefore, in the temporary construction method for working scaffolding in a boiler furnace of the present invention, a plurality of support frames are hooked on the upper ends of the refractory material 116 and suspended in the clinker hopper 112, and the scaffolding work floor is attached between the suspended support frames. The work scaffolding is temporarily installed in the clinker hopper 112.

Therefore, as shown in FIG. 1, the work scaffold 1 used in the temporary construction method of the work scaffold in the boiler according to the embodiment of the present invention includes 13 intermediate frames 10, two end frames 20, and a first. And the second frontage installation frames 30, 40, two outer and inner frontage frames 60, 70 (see FIG. 2), and a large number of anti-plates 81 (see FIG. 2) for forming the scaffolding work floor. ), A plurality of skirting boards 82, 83, a plurality of handrails 84, a carry-in stand 91, a member carry-in inclined stand 92, a plurality of universal jacks 93, a plurality of dedicated handrails 94, and members. A carry-in winch 95 and a member carry-in wire 96 are provided.

Here, as shown in FIG. 3A, the intermediate frame 10 includes a horizontal beam 11, left and right support beams 12L and 12R, left and right hook plates 13L and 13R, and left and right claw plates 14L. , 14R.

The horizontal beam 11 has a truss structure in which an upper pipe having a length of ≈3 m and a lower pipe having a length of ≈3.2 m are connected by four vertical members and eight diagonal members.

The left support beam 12L is configured by connecting a left pipe having a length of ≈1.5 m and a right pipe having a length of ≈1.6 m with five connecting plates with their upper ends aligned, with respect to the horizontal beam 11. The lower end is attached to the left end of the horizontal beam 11 so as to be vertical.
Similarly, the right support beam 12R is configured by connecting a left pipe having a length of ≈1.6 m and a right pipe having a length of ≈1.5 m with the upper ends aligned by five connecting plates, and is a horizontal beam. The lower end is attached to the right end of the horizontal beam 11 so as to be perpendicular to 11.
The distance between the center line of the left pipe and the center line of the right pipe of the left and right support beams 12L and 12R is about 10 cm.
The distance between the center line of the right pipe of the left support beam 12L and the center line of the left pipe of the right support beam 12R is about 3.1 m, and the center line of the left pipe of the left support beam 12L and the right support. The distance between the beam 12R and the center line of the right pipe is about 3.3 m.

The left hook plate 13L has a length (length from the left end surface to the right end surface) ≈50 cm, a width (length from the front surface to the back surface) ≈12.5 cm, and a thickness (length from the upper surface to the lower surface) ≈6. A .5 cm square plate, a thin right triangle plate-shaped upper support plate whose bottom surface is fixed to the center of the upper surface of the square plate and whose right end surface is fixed to the left pipe of the left support beam 12L, and a square plate whose bottom surface is a square plate. The right end surface is composed of a thin inverted right triangle plate-shaped lower support plate fixed to the left pipe of the left support beam 12L while being fixed to the central part of the lower surface of the left support beam 12L. The right end portion is fixed to the upper end portion of the left support beam 12L so as to be.
Similarly, the right hook plate 13R has a length (length from the left end surface to the right end surface) ≈50 cm, a width (length from the front surface to the back surface) ≈12 cm, and a thickness (length from the upper surface to the lower surface) ≈ A 6.5 cm square plate, a thin right triangle plate-shaped upper support plate whose bottom surface is fixed to the center of the upper surface of the square plate and whose left end surface is fixed to the right pipe of the right support beam 12R, and the bottom surface is square. It is composed of a thin inverted right triangle plate-shaped lower support plate fixed to the center of the lower surface of the plate and the left end surface fixed to the right pipe of the right support beam 12R, and is perpendicular to the right support beam 12R. The left end portion is fixed to the upper end portion of the right support beam 12R so as to be.

The left claw plate 14L is made of a thin plate, and is attached to the left end surface of the left hook plate 13L so that the lower end portion protrudes downward from the left hook plate 13L.
Similarly, the right claw plate 14R is made of a thin plate, and is attached to the right end surface of the right hook plate 13R so that the lower end portion protrudes downward from the right hook plate 13R.
Further, the distance between the left pipe of the left support beam 12L and the left claw plate 14L and the distance between the right pipe of the right support beam 12R and the right claw plate 14R are made larger than the thickness of the refractory material 116 of the boiler furnace 110. ..
As a result, as shown in FIG. 4, the intermediate frame 10 is suspended in the clinker hopper 112 by hooking the left and right support beams 12L and 12R on the upper ends of the refractory material 116 attached to the inner surface of the clinker hopper 112. Can be lowered.

As shown in FIG. 3B, the end frame 20 has a handrail 25 composed of two horizontal pipes and four vertical pipes attached between the left support beam 22L and the right support beam 22R. Except for the above-mentioned points, the structure is the same as that of the intermediate frame 10 described above.

As shown in FIG. 3C, in the first frontage installation frame 30, two stanchions 35 for attaching the two columns 85 are erected upward on the horizontal beam 31 at predetermined intervals. The structure is the same as that of the intermediate frame 20 described above, except that the left and right support beams 32L and 32R are reinforced and attached to the horizontal beam 31.

In the second frontage installation frame 40, as shown in FIG. 3D, additional stanchions 45 are connected one by one to the inside of the two stanchions 45 (the lateral center side of the horizontal beam 41). Except for the above-mentioned points, the frame 30 is configured in the same manner as the first frontage installation frame 30 described above.

As shown in FIG. 5A, the outer frontage frame 60 includes a horizontal beam 61 and three stanchions 62.

The horizontal beam 61 has a truss structure in which an upper pipe having a length of ≈ 5.9 m and a lower pipe having a length of ≈ 5.7 m are connected by seven vertical members and 14 diagonal members.
The left and right ends of the lower pipe of the horizontal beam 61 are provided with slopes so as to be located diagonally upward, and are connected to the upper pipe via a mounting plate.

The lower end of the three stanchions 62 is attached to the upper end of the vertical member, and the three stanchions 62 are erected upward on the horizontal beam 61 at predetermined intervals.

As shown in FIG. 5B, the inner frontage frame 70 is provided with the exception that the lower ends of the three stanchions 72 are attached to the upper surface of the upper pipe and are erected on the horizontal beam 71 at predetermined intervals. It is configured in the same manner as the outer frontage frame 60 described above.

At the left and right ends of the anti-plate 81, the horizontal beams 11 of the intermediate frame 10, the horizontal beams 21 of the end frame 20, the horizontal beams 31, 41 and the outside of the first and second frontage installation frames 30 and 40, and the outside and A hook for hooking on the upper pipes of the horizontal beams 61 and 71 of the inner frontage frames 60 and 70 is attached.
The anti-plate 81 is prepared with dimensions according to the mounting position.

The skirting boards 82 and 83 and the handrail 84 are for preventing falling and the like, and are attached to the left and right ends of the scaffolding work floor.

In the carry-in stand 91 and the member carry-in inclined stand 92, the work scaffolding member and the maintenance scaffolding member are placed on the bogie, and the pyramid-shaped lower part on the surface side of the pyramid-shaped lower part divided into three parts of the clinker hopper 112 (hereinafter referred to as the pyramid-shaped lower part). It is intended to be carried into the clinker hopper 112 through a manhole 114 (see FIG. 8 (a)) opened in a “surface-side pyramidal lower portion”).
Therefore, the carry-in stand 91 is installed near the manhole 114 outside the boiler furnace 110, and rails for bogies are attached to the left and right ends of the carry-in stand 91 toward the member carry-in inclined stand 92.

The member loading tilted pedestal 92 has a stepped shape, and as shown in FIG. 1, the lower end thereof is connected to the loading pedestal 91 and a plurality of universal jacks 93 are used to form a pyramid-shaped lower portion on the surface side of the clinker hopper 112. It is attached.
At the left and right ends of the member loading tilted pedestal 92, trolley rails connected to the trolley rails of the loading pedestal 91 are attached to the upper end of the member loading inclined pedestal 92.
A plurality of dedicated handrails 94 are attached to the member loading inclined stand 92 in order to prevent workers and the like from falling.

The member carry-in winch 95 is for moving the bogie along the bogie rail, and is installed under the member carry-in inclined stand 92 side of the carry-in stand 91.
One end of the member loading wire 96 is fixed to the trolley, folded back at the upper end of the member loading inclined frame 92, and the other end is fixed to the member loading winch 95.
As a result, by driving the member carry-in winch 95 and winding the member carry-in wire 96, the bogie is moved from the carry-in stand 91 to the upper end of the member carry-in inclined stand 92 along the bogie rail.

Next, a procedure for temporarily installing the work scaffold 1 in the clinker hopper 112 will be described.
(Procedure 1) Installation of the lifting device 130 and the moving winch 140, etc. The worker attaches the lifting device 130 and the moving winch 140 shown in FIG. 9 in the same manner as the scaffolding member loading device described in Patent Document 1 above. Attached to the boiler furnace 110.
Here, the lifting device 130 moves along the main wire 131 stretched horizontally through the wire holes 115 (see FIG. 8A) provided on the front surface and the back surface of the combustion chamber 111, and along the main wire 131. It includes a trolley 132 and a chain block 133 suspended from the trolley 132 and suspended from the cleaner hopper 112 through the vertical communication hole 113 of the boiler furnace 110.
The two moving winches 140 are for pulling the trolley 132 and moving it along the main wire 131 by winding the wire 141.

(Procedure 2) Installation of carry-in stand 91 and inclined stand 92 for carrying members (see FIG. 6A)
The worker installed the carry-in stand 91 near the manhole 114 outside the boiler furnace 110, and inserted the upper end of the member carry-in inclined stand 92 into the clinker hopper 112 through the manhole 114, and inserted the member carry-in inclined stand 92. The upper end portion of the above is lifted by using the lifting device 130 and the moving winch 140, and the portion other than the lower end portion of the member loading inclined frame 92 is inserted into the clinker hopper 112, and the lower end portion of the member loading inclined frame 92 and the loading stand After connecting the 91, the member loading inclined frame 92 is fixed to the surface side angular cone-shaped lower part of the clinker hopper 112 by using a plurality of universal jacks 93, and the member loading inclined frame 92 is placed in the clinker hopper 112. Install.

(Procedure 3) Installation of carry-in frontage (see Fig. 6 (b))
The worker puts the first frontage installation frame 30 on the trolley on the carry-in stand 91 by using human power or an outdoor crane, drives the member carry-in winch 95, and winds up the member carry-in wire 96 on the trolley. The first frontage installation frame 30 is carried into the clinker hopper 112 through the manhole 114, and then the first frontage installation frame 30 is lifted by the lifting device 130 and the position is adjusted by the moving winch 140. While being hooked on the upper ends of the fireproof material 116 at the left and right ends of the clinker hopper 112, the first frontage installation frame 30 is hung near the upper end of the member loading inclined frame 92.
Subsequently, the worker similarly suspends the second frontage installation frame 40 above the central portion of the member loading inclined frame 92. At this time, the position is adjusted by the moving winch 140 so that the outer and inner frontage frames 60 and 70 can be attached to the first frontage installation frame 30 suspended earlier.
Subsequently, the worker similarly carries the two outer frontage frames 60 into the clinker hopper 112 through the manhole 114, and then suspends the first and second frontage installation frames 30 and 40. Install between the left and right ends.
Subsequently, the worker similarly carries the two inner frontage frames 70 into the clinker hopper 112 through the manhole 114, and then suspends the second and third frontage installation frames 30 and 40. It is attached between the central parts at a predetermined interval (see FIG. 2).
Subsequently, the worker attaches the anti-plate 81 between the outer and inner frontage frames 60 and 70 (see FIG. 2), and splints 83 and handrails 84 and the like between the outer and inner frontage frames 60 and 70. To install.
As a result, a carry-in frontage (length ≈ 1.4 m and width ≈ 6 m) is secured between the first and second frontage installation frames 30 and 40, and aisle floors are secured before and after the carry-in frontage. Can be done.

(Procedure 4) Installation of the intermediate frame 10 and the end frame 20 and the like on the adjacent side of the second frontage installation frame 40 (see FIG. 7).
The worker suspends the intermediate frame 10 next to the second frontage installation frame 40, which is suspended earlier, in the same manner as the first frontage installation frame 30 described above.
At this time, in order to reduce the burden associated with the installation of the carry-in frontage, the distance from the second frontage installation frame 40 suspended earlier is narrower than the distance between the adjacent intermediate frames 10 and is suspended first. The position of the moving winch 140 is adjusted so that the anti-plate 81 can be attached to the lowered second frontage installation frame 40.
Subsequently, the worker attaches the anti-plate 81 between the suspended intermediate frame 10 and the previously suspended second frontage installation frame 40 (see FIG. 2), and between the two. A splint 82, a handrail 84, etc. are attached.
Subsequently, the worker similarly suspends the other intermediate frame 10 next to the intermediate frame 10 that was previously suspended, and then between the two, the anti-plate 81, the splint 82, the handrail 84, and the like. (See Fig. 2).
Subsequently, in the same manner, the worker suspends the end frame 20 next to the other intermediate frame 10 suspended first, and then between the two, the anti-plate 81, the splint 82, the handrail 84, etc. (See Fig. 2).

(Procedure 5) Installation of the intermediate frame 10 and the end frame 20 and the like on the adjacent side of the first frontage installation frame 30 (see FIG. 1).
Subsequently, the worker suspends the intermediate frame 10 next to the first frontage installation frame 30 that was previously suspended in the same manner as the first frontage installation frame 30 described above.
At this time, in order to reduce the burden associated with the installation of the carry-in frontage, the distance from the first frontage installation frame 30 suspended earlier is narrower than the distance between the adjacent intermediate frames 10 and is suspended first. The position of the moving winch 140 is adjusted so that the anti-plate 81 can be attached to the lowered first frontage installation frame 30.
Subsequently, the worker attaches the anti-plate 81 between the suspended intermediate frame 10 and the previously suspended first frontage installation frame 30 (see FIG. 2), and between the two. A splint 82, a handrail 84, etc. are attached.
Subsequently, in the same manner, the worker suspends the ten other intermediate frame 10s in order next to the intermediate frame 10 in which the other intermediate frames 10 are suspended first, and the anti-plate 81 between the adjacent intermediate frames 10 A splint 82, a handrail 84, etc. are attached (see FIG. 2).
Subsequently, the worker similarly hangs the end frame 20 next to the other intermediate frame 10 that was last hung, and then between the two, the anti-plate 81, the splint 82, the handrail 84, and the like. (See Fig. 2).

By temporarily installing the work scaffolding 1 in the cleaner hopper 112 as described above, the maintenance scaffolding member is used as the carry-in stand 91, the member carry-in inclined stand 92, the member carry-in winch 95, the member carry-in wire 96, and the like. After being carried onto the floor of the scaffolding work 1, the combustion chamber 111 is passed through the narrow vertical communication hole 113 using the lifting device 130 and the moving winch 140 without using the scaffolding member rotating device described in Patent Document 1 described above. The scaffolding for maintenance can be assembled in the combustion chamber 111.

Further, even in the boiler furnace 110 in which the pyramidal lower portion of the clinker hopper 112 is divided into a plurality of parts, the intermediate frame 10 or the like is suspended above the pyramidal lower portion and scaffolded on the suspended intermediate frame 10 or the like. By attaching the work floor, the work scaffold 1 can be easily temporarily installed.

1 Work scaffolding 10 Intermediate frame 11,21,31,41,61,71 Horizontal beams 12L, 12R, 22L, 22R, 32L, 32R, 42L, 42R Left and right support beams 13L, 13R, 23L, 23R, 33L, 33R, 43L, 43R Left and right hook plates 14L, 14R, 24L, 24R, 34L, 34R, 44L, 44R Left and right claw plates 20 End frame 25 Handrails 30, 40 First and second frontage installation frames 35 , 45, 62, 72 Stance 60, 70 Outer and inner frontage frame 81 Anti-plate 82,83 Width wood 84 Handrail 85 Strut 91 Carry-in stand 92 Inclination stand for member carry-in 93 Flexible jack 94 Dedicated handrail 95 Winch for carry-in member 96 Wire 110 Boiler furnace 111 Combustion chamber 112 Cleaner hopper 113 Vertical communication hole 114 Manhole 115 Wire hole 116 Fireproof material 120 Sealing device 121 Sealing plate 122 Seal trough 130 Lifting device 131 Main wire 132 Trolley 133 Chain block 140 Moving winch 141 Wire

Claims (11)

When performing maintenance work in the combustion chamber (111) of the boiler furnace (110) in which the vertical communication hole (113) and the cleaner hopper (112) are separated, the maintenance scaffolding member is lifted from the cleaner hopper to the combustion chamber. This is a temporary construction method for work scaffolding in a boiler furnace for temporarily installing a work scaffolding (1) in the cleaner hopper.
A support frame mounting step in which a plurality of support frames (10, 20) are hung by hooking them on the upper end portion of the refractory material (116) mounted on the inner surface of the clinker hopper.
A scaffolding work floor attachment step for attaching the scaffolding work floor (81) to the plurality of suspended support frames, and
A temporary construction method for work scaffolding in a boiler furnace, which is characterized by being equipped with. The pyramidal lower part of the clinker hopper is divided into a plurality of parts.
In the support frame mounting step, the plurality of support frames are hung above the pyramid-shaped lower portion divided into the plurality.
In the scaffolding work floor attachment step, the scaffolding work floor is attached to the plurality of suspended support frames.
The scaffolding work floor is attached above the plurality of divided pyramidal lower parts.
The temporary construction method for working scaffolding in a boiler furnace according to claim 1, wherein the method is characterized by the above. A manhole (114) is opened in the surface-side pyramidal lower part of the plurality of pyramid-shaped lower parts.
In the support frame mounting step and the scaffolding work floor mounting step, the plurality of support frames and a plurality of anti-plates (81) for forming the scaffolding work floor are carried into the clinker hopper through the manhole. ,
The temporary construction method for working scaffolding in a boiler furnace according to claim 2, wherein the method is characterized by the above. Prior to the support frame mounting step, the main wire (131) is stretched horizontally through the wire holes (115) provided on the front and back surfaces of the combustion chamber to mount the lifting device (130) to the boiler furnace. The boiler furnace according to claim 3, further comprising a lifting device or the like mounting step for mounting a moving winch (140) for moving the trolley (132) along the main wire to the boiler furnace. Internal work scaffold temporary construction method. To carry the plurality of support frames, the plurality of anti-plates, and the maintenance scaffolding member into the cleaner hopper through the manhole after the mounting step of the lifting device and the like and before the support frame mounting step. The method for temporarily constructing a work scaffold in a boiler according to claim 4, further comprising an installation step of a carry-in stand or the like for attaching a carry-in stand (91) and a member carry-in inclined stand (92). In the installation step of the carry-in stand, etc.
The carry-in stand is installed in the vicinity of the manhole outside the boiler furnace, and the loading stand is installed.
The upper end of the inclined frame for carrying the member is inserted into the clinker hopper through the manhole.
The upper end of the inserted member-carrying inclined frame is lifted by using the lifting device and the moving winch, and the part other than the lower end of the member-carrying inclined frame is inserted into the clinker hopper.
The lower end of the member loading tilted stand and the loading stand are connected to each other.
The inclined stand for carrying members is fixed to the surface-side pyramidal lower portion by using a plurality of universal jacks (93).
The temporary construction method for working scaffolding in a boiler furnace according to claim 5, characterized in that. The work in the boiler furnace according to claim 5 or 6, further comprising a carry-in frontage installation step of installing the carry-in frontage above the member carry-in inclined stand after the carry-in stand or the like installation step. Temporary scaffolding method. In the carry-in frontage installation step
The first and second frontage installation frames (30, 40) are carried into the clinker hopper through the manhole, and are hooked on the upper end of the refractory material by using the lifting device and the moving winch. Suspended above the tilting stand for loading,
The outer and inner frontage frames (60, 70) are carried into the clinker hopper through the manhole and attached between the first and second frontage installation frames.
The temporary construction method for working scaffolding in a boiler furnace according to claim 7, characterized in that. The support frame
Horizontal beams (11, 21) with a truss structure in which the upper and lower pipes are connected by a plurality of vertical and diagonal lumbers.
The left pipe and the right pipe are connected by a plurality of connecting plates with their upper ends aligned, and the lower end is attached to the left end of the horizontal beam so as to be perpendicular to the horizontal beam. Support beams (12L, 22L) and
The other left pipe and the other right pipe are connected by a plurality of other connecting plates with their upper ends aligned, and the lower end is the right end of the horizontal beam so as to be perpendicular to the horizontal beam. Right support beams (12R, 22R) attached to the part,
Left hook plates (13L, 23L) whose right end is fixed to the upper end of the left support beam so as to be perpendicular to the left support beam.
A right hook plate (13R, 23R) whose left end is fixed to the upper end of the right support beam so as to be perpendicular to the right support beam.
Left claw plates (14L, 24L) attached to the left end surface of the left hook plate so that the lower end portion protrudes downward from the left hook plate.
The right claw plate (14R, 24R) attached to the right end surface of the right hook plate so that the lower end portion protrudes downward from the right hook plate.
The method for temporarily constructing a work scaffold in a boiler according to any one of claims 3 to 8, wherein the method is provided. In the scaffolding work floor mounting step, hooks attached to both ends of the anti-plate are hooked on the upper pipe of the horizontal beam, and a plurality of the anti-plates are placed between adjacent support frames of the plurality of support frames. The work scaffolding temporary construction method in a boiler according to claim 9, wherein the scaffolding is attached one by one. The plurality of support frames include an intermediate frame (10) and an end frame (20).
The intermediate frame includes a first horizontal beam (11) corresponding to the horizontal beam, a first left support beam (12L) corresponding to the left support beam, and a first horizontal beam corresponding to the right support beam. Corresponds to the right support beam (12R), the first left hook plate (13L) corresponding to the left hook plate, the first right hook plate (13R) corresponding to the right hook plate, and the left claw plate. A first left claw plate (14L) and a first right claw plate (14R) corresponding to the right claw plate are provided.
The end frame corresponds to the horizontal beam, the second horizontal beam (21), the second left support beam (22L) corresponding to the left support beam, and the second support beam corresponding to the right support beam. Corresponds to the right support beam (22R), the second left hook plate (23L) corresponding to the left hook plate, the second right hook plate (23R) corresponding to the right hook plate, and the left claw plate. It is attached between the second left claw plate (24L), the second right claw plate (24R) corresponding to the right claw plate, the second left support beam, and the second right support beam. With a handrail (25),
The temporary construction method for working scaffolding in a boiler furnace according to claim 9 or 10, characterized in that.

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